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Method for cooling wetplate disc brake especially for automatic transmission with different radial direction of coolant flow depending on setting of brake

A technology for automatic transmissions and brakes, applied in the direction of axial brakes, brake components, brake types, etc., can solve the problem of no structural space for the transmission housing

Active Publication Date: 2009-05-27
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although the radially inner area of ​​the multi-disc brake disk pack can prevent excessive oil flow from other transmission components arranged radially inwardly in the transmission housing by means of the oil deflector plate, there are no structures available for this purpose in the transmission housing without exception. space

Method used

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  • Method for cooling wetplate disc brake especially for automatic transmission with different radial direction of coolant flow depending on setting of brake
  • Method for cooling wetplate disc brake especially for automatic transmission with different radial direction of coolant flow depending on setting of brake
  • Method for cooling wetplate disc brake especially for automatic transmission with different radial direction of coolant flow depending on setting of brake

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Embodiment Construction

[0067] FIG. 1 accordingly shows a multi-disk brake 1 according to a first embodiment of the invention. The multi-disk brake 1 is designed as a shifting element of an automatic transmission, which is shown in part, and initially includes, in a manner known per se, an inner disk carrier 4 carrying an inner disk 3 , which is connected to a rotatable part of the automatic transmission. Furthermore, the multi-disk brake 1 carries an outer disk carrier 6 of the outer disk 5 , which is connected in a rotationally fixed manner to a housing 12 of the automatic transmission. The inner disks 3 and the outer disks 5 are arranged axially side by side alternately and together with the two end disks 8 and 9 and a supporting disk 11 form a disk pack 14 . One end friction plate 8 is axially loaded by the piston 10 of the pressure oil-operated piston-cylinder system to close the operating force of the plate brake 1, while the opposite supporting friction plate 11 is fixedly connected with the o...

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Abstract

The invention relates to a multiple-disk brake (1) in an automatic transmission, having an inner disk carrier (4) and an outer disk carrier (6), further having inner disks (3) and outer disks (5) disposed in an axially alternating manner on the disk carriers (4, 8), further having friction linings (7) on the inner and outer disks (3, 5), having a piston (10) of a pressure medium-actuatable piston-cylinder arrangement, by which a force closing the multiple-disk brake can be applied to the inner disks (3) and outer disks (5), further having an end disk (9) away from the piston or a support disk (11) forming an axial abutment for the disk set (14) configured by the disks (3, 5, 9, 11), and wherein the multiple-disk brake (1) and / or the surrounding components are configured such that the disks (3, 5, 9, 11) can be wetted by a cooling oil. In order to cool the multiple-disk brake (1), even in slip mode phases and in a closed state, it is provided that the cooling oil (13), as a function of the operating status of the brake, can be conducted in radially different directions via and / or through the disk set (14). The invention relates also to a method for operating said multiple-disk brake.

Description

technical field [0001] The invention relates to a multi-disk brake for an automatic transmission with a controlled cooling oil supply and a method for its operation according to claim 1 or the preamble to claim 42 . Background technique [0002] Multi-disk clutches of this type are known per se and are used, for example, as starting or shifting components in automatic transmissions of motor vehicles. Wet-running multi-disc clutches are usually supplied with cooling oil from the radially inner to the radially outer, since the cooling oil is thrown radially outward by the rotational movement of the clutch input or output side and thus achieves a conveying effect of the heated cooling oil in the clutch. With wet-running multi-disc brakes, this radial delivery of cooling oil cannot or can only be carried out to a lesser extent, since when the brake is engaged, the rotating brake part stops with energy consumption, contrary to the stationary brake part. Such multi-disk brakes ar...

Claims

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Application Information

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IPC IPC(8): F16D65/853F16D55/00F16D65/78F16H57/04
CPCF16H57/0484F16H57/0479F16D2065/787F16D2065/783F16H57/0473F16D65/853F16H63/3026F16D65/78F16D55/00
Inventor 约瑟夫·豪普特
Owner ZF FRIEDRICHSHAFEN AG
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